use bootstrap font colour instead of css

Netdisco/share/public/css/netdisco.css

@@ -27,14 +27,6 @@ body {
   width: 100%;
 }
 
-.nd_user_port_control {
-  color: rgba(255,255,0,0.8) !important;
-}
-
-.nd_user_admin {
-  color: rgba(255,0,0,0.8) !important;
-}
-
 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
 /* various styles to adjust the hero box used for homepage + login */
 

Netdisco/share/views/layouts/main.tt

@@ -101,9 +101,9 @@
         <li class="dropdown">
           <a href="#" class="dropdown-toggle" data-toggle="dropdown">
           [% IF vars.user.admin %]
-            <i class="icon-user nd_user_admin"></i>
+            <i class="icon-user text-error"></i>
           [% ELSIF vars.user.port_control %]
-            <i class="icon-user nd_user_port_control"></i>
+            <i class="icon-user text-warning"></i>
           [% ELSE %]
             <i class="icon-user"></i>
           [% END %]